Final answer:
The 2 in the tens place of the number 22,222 holds a value that is ten times that of the 2 in the ones place, making it the digit that is 1/10 the value when reversed.
Step-by-step explanation:
The digit that holds a value that is 1/10 the value of the underlined digit in the number twenty-two thousand two hundred twenty-two (22,222) is the 2 in the tens place. In the given number, the 2 in the ones place has a place value of 2. The place value of the 2 in the tens place is 20, which is ten times greater than the 2 in the ones place, and hence the 2 in the tens place holds a value that is ten times that of the 2 in the ones place. Conversely, the 2 in the ones place holds a value that is 1/10 of the 2 in the tens place.